Analysis Overview
SHA256
2e77a1b324229a10ce5ac15a916526eff4a1e44c291bb918d6ed5329bc56f81b
Threat Level: Known bad
The file 8C36F8A010E9781BDA4076852EFB05A7.exe was found to be: Known bad.
Malicious Activity Summary
Oski family
Oski
Downloads MZ/PE file
Checks computer location settings
Deletes itself
Reads user/profile data of web browsers
Loads dropped DLL
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Enumerates physical storage devices
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Checks processor information in registry
Kills process with taskkill
Suspicious use of WriteProcessMemory
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-01-13 05:51
Signatures
Oski family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-13 05:51
Reported
2024-01-13 05:53
Platform
win7-20231215-en
Max time kernel
117s
Max time network
118s
Command Line
Signatures
Oski
Downloads MZ/PE file
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
Reads user/profile data of web browsers
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1268 wrote to memory of 2552 | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1268 wrote to memory of 2552 | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1268 wrote to memory of 2552 | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1268 wrote to memory of 2552 | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2552 wrote to memory of 320 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 2552 wrote to memory of 320 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 2552 wrote to memory of 320 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 2552 wrote to memory of 320 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe
"C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 1268 & erase C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe & RD /S /Q C:\\ProgramData\\157427143777317\\* & exit
C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 1268
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 9entrevera.sa.com | udp |
| AU | 103.83.194.50:80 | 9entrevera.sa.com | tcp |
Files
\ProgramData\sqlite3.dll
| MD5 | e477a96c8f2b18d6b5c27bde49c990bf |
| SHA1 | e980c9bf41330d1e5bd04556db4646a0210f7409 |
| SHA256 | 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660 |
| SHA512 | 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c |
\ProgramData\nss3.dll
| MD5 | bfac4e3c5908856ba17d41edcd455a51 |
| SHA1 | 8eec7e888767aa9e4cca8ff246eb2aacb9170428 |
| SHA256 | e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78 |
| SHA512 | 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66 |
\ProgramData\mozglue.dll
| MD5 | 8f73c08a9660691143661bf7332c3c27 |
| SHA1 | 37fa65dd737c50fda710fdbde89e51374d0c204a |
| SHA256 | 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd |
| SHA512 | 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-13 05:51
Reported
2024-01-13 05:53
Platform
win10v2004-20231215-en
Max time kernel
149s
Max time network
140s
Command Line
Signatures
Oski
Downloads MZ/PE file
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
Reads user/profile data of web browsers
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
| Token: SeManageVolumePrivilege | N/A | C:\Windows\System32\svchost.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3516 wrote to memory of 4652 | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3516 wrote to memory of 4652 | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3516 wrote to memory of 4652 | N/A | C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4652 wrote to memory of 3640 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 4652 wrote to memory of 3640 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
| PID 4652 wrote to memory of 3640 | N/A | C:\Windows\SysWOW64\cmd.exe | C:\Windows\SysWOW64\taskkill.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe
"C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 3516 & erase C:\Users\Admin\AppData\Local\Temp\8C36F8A010E9781BDA4076852EFB05A7.exe & RD /S /Q C:\\ProgramData\\700972825157161\\* & exit
C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 3516
C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k UnistackSvcGroup
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 9entrevera.sa.com | udp |
| AU | 103.83.194.50:80 | 9entrevera.sa.com | tcp |
| US | 8.8.8.8:53 | 146.78.124.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 1.181.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.194.83.103.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.241.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 119.110.54.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 176.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 211.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | udp | |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 32.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
Files
C:\ProgramData\sqlite3.dll
| MD5 | e477a96c8f2b18d6b5c27bde49c990bf |
| SHA1 | e980c9bf41330d1e5bd04556db4646a0210f7409 |
| SHA256 | 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660 |
| SHA512 | 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c |
C:\ProgramData\mozglue.dll
| MD5 | 8f73c08a9660691143661bf7332c3c27 |
| SHA1 | 37fa65dd737c50fda710fdbde89e51374d0c204a |
| SHA256 | 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd |
| SHA512 | 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89 |
C:\ProgramData\nss3.dll
| MD5 | 0daa3bbae94b235bbaaf5b9c0c7ac521 |
| SHA1 | 8d31fa29babe1c88c72c0c4e35e618b5bb850829 |
| SHA256 | 3df4946812ab6d8b20d23b34538cbd8e8c264d60de7811294bc2f4b46ec6c9a6 |
| SHA512 | a3a259af84ed280266522ef3ed4486eea36b32a4d0a956f458dd4df6ede03b1dc34ae7e55d601f09eaedddc9646012fb4cd74eb410d4cadeb59888aeb3e85eb5 |
memory/4488-64-0x000001857F240000-0x000001857F250000-memory.dmp
memory/4488-80-0x000001857F340000-0x000001857F350000-memory.dmp
memory/4488-96-0x000001857F650000-0x000001857F651000-memory.dmp
memory/4488-98-0x000001857F680000-0x000001857F681000-memory.dmp
memory/4488-99-0x000001857F680000-0x000001857F681000-memory.dmp
memory/4488-100-0x000001857F790000-0x000001857F791000-memory.dmp